I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
greedily greatly creedal grittily cordially gradually credal cordial crudely gradual gardyloo cartel curtly
greedily reedily worriedly uredial readily redial redly rowdily ruddily broodily variedly hardily hurriedly praedial predial serriedly tardily tiredly wordily shrewdly
greed greedy creed gored greet agreed